Electrical Schematic Symbols

Voltage Indicators

Symbol	Description
Courtesy of GM	Battery Voltage
Courtesy of GM	Ignition Switch - Off Position
Courtesy of GM	Ignition Switch - Accessory Position
Courtesy of GM	Ignition Switch - Run Position
Courtesy of GM	Ignition Switch - Start Position

General Icons

Symbol	Description
Courtesy of GM	Master Component List Icon This icon is used on the schematic to link to the Master Electrical Component List.
Courtesy of GM	Description and Operation Icon This icon is used on the schematic to link to the Description and Operation of that particular system.
Courtesy of GM	Computer Programming Icon This icon is used on the schematic to link to Control Module References, which identifies which components need programming upon replacement.
Courtesy of GM	Next Schematic Page Icon This icon is used on the schematic to navigate to the next schematic in the subsystem.
Courtesy of GM	Previous Schematic Page Icon This icon is used on the schematic to navigate to the previous schematic in the subsystem.
Courtesy of GM	Supplemental Inflatable Restraint (SIR) or Supplemental Restraint System (SRS) Icon This icon is used to alert the technician that the system contains SIR/SRS components that require certain precautions before servicing.
Courtesy of GM	Information Icon This icon is used to alert the technician that there is additional information that will aid in servicing a system.
Courtesy of GM	Danger Icon This icon is intended to alert the technician that a component within the system contains labeling with the same icon. This icon is used when a source component has potential for 60 volts DC or greater or has potential for 42 volts AC or greater.
Courtesy of GM	High Voltage Icon This icon is intended to alert the technician that a component within the system contains labeling with the same icon. This icon is used when a component/circuit has potential for 60 volts DC or greater or has potential for 42 volts AC or greater.
Courtesy of GM	Caution Icon This icon is used to advise the technician to use caution when servicing this component. This icon may be used when a component/circuit has a voltage range potential between 30-60 volts DC or 15-42 volts AC.
Courtesy of GM	Functional Serial Data Communication This icon is used to show the technician that the serial data circuit detail is shown incomplete. It also provides an active link to the Data Communication Wiring Schematics were the circuit is shown complete.

Switch Position Icons

Symbol	Description
Courtesy of GM	Generic Up Arrows
Courtesy of GM	Generic Down Arrows
Courtesy of GM	Generic Left Arrows
Courtesy of GM	Generic Right Arrows
Courtesy of GM	Generic Express Down Arrows
Courtesy of GM	On/Off Icon
Courtesy of GM	Generic Lock Icon
Courtesy of GM	Generic Unlock Icon
Courtesy of GM	Generic Window Switch Positions - 4 Door
Courtesy of GM	Generic Window Switch Positions - 2 Door

Module Circuit Function Icons

Symbol	Description
Courtesy of GM	I/O Pull-Down Resistors (-)
Courtesy of GM	I/O Pull-Up Resistors (+)
Courtesy of GM	I/O High-Side Drive Switch (+)
Courtesy of GM	I/O Low-Side Drive Switch (+)
Courtesy of GM	I/O Bidirectional Switch (+/-)
Courtesy of GM	Pulse-Width Modulation Symbol
Courtesy of GM	Battery Voltage
Courtesy of GM	Ignition Voltage
Courtesy of GM	Voltage Reference
Courtesy of GM	A/C Voltage
Courtesy of GM	Low Reference
Courtesy of GM	Ground
Courtesy of GM	Serial Data
Courtesy of GM	Antenna Signal - In
Courtesy of GM	Antenna Signal - Out
Courtesy of GM	Brake Apply

Harness Components

Symbol	Description
Courtesy of GM	Fuse
Courtesy of GM	Fuse Supplied by a Relay
Courtesy of GM	Circuit Breaker
Courtesy of GM	Fusible Link
Courtesy of GM	Ground
Courtesy of GM	Case Ground
Courtesy of GM	Inline Harness Connector
Courtesy of GM	Inline Harness Connector
Courtesy of GM	Pigtail Connection
Courtesy of GM	Pigtail Connection
Courtesy of GM	Provisional or Diagnostic Connector
Courtesy of GM	Blunt Cut Wire
Courtesy of GM	Incomplete Physical Splice
Courtesy of GM	Complete Physical Splice - 2 Wires
Courtesy of GM	Complete Physical Splice - 3 or more wires
Courtesy of GM	Wire Crosses
Courtesy of GM	Twisted Wires
Courtesy of GM	Shield
Courtesy of GM	Circuit References
Courtesy of GM	Circuit Continuation Arrowheads
Courtesy of GM	Option Break point
Courtesy of GM	Ground Circuit Connection
Courtesy of GM	Connector Shorting Clip

Component Parts

Symbol	Description
Courtesy of GM	Partial Component When a component is represented in a dashed box, the component or its wiring is not shown in its entirety.
Courtesy of GM	Entire Component When a component is represented in a solid box the component or its wiring is shown in its entirety.
Courtesy of GM	Connector Directly Attached to Component
Courtesy of GM	Pigtail Connector

Switches and Relays

Symbol	Description
Courtesy of GM	Accessory Power Outlet
Courtesy of GM	Cigar Lighter
Courtesy of GM	Switch - 2 Position Normally Open
Courtesy of GM	Switch - 2 Position Normally Closed
Courtesy of GM	Switch - Rocker
Courtesy of GM	Switch - Contact Plate (1 Wire)
Courtesy of GM	Switch - Contact Plate (2 Wire)
Courtesy of GM	Switch - 3 Position
Courtesy of GM	Switch - 4 Position
Courtesy of GM	Switch - 5 Position
Courtesy of GM	Switch - 6 Position
Courtesy of GM	Switch Actuator - Push (Momentary)
Courtesy of GM	Switch Actuator - Push (Latching)
Courtesy of GM	Switch Actuator - Pull (Momentary)
Courtesy of GM	Switch Actuator - Pull (Latching)
Courtesy of GM	Switch Actuator - Rotate (Momentary)
Courtesy of GM	Switch Actuator - Rotate (Latching)
Courtesy of GM	Switch Actuator - Slide (Momentary)
Courtesy of GM	Switch Actuator - Slide (Latching)
Courtesy of GM	Switch Actuator - Pressure (Momentary)
Courtesy of GM	Switch Actuator - Temperature (Momentary)
Courtesy of GM	Switch Actuator - Volume (Latching)
Courtesy of GM	4-Pin Single Pole/Throw Relay - Normally Open
Courtesy of GM	5-Pin Relay - Normally Closed

Devices and Sensors

Symbol	Description
Courtesy of GM	Battery
Courtesy of GM	Battery Assembly - Hybrid
Courtesy of GM	Single Filament Light Bulb
Courtesy of GM	Double Filament Light Bulb
Courtesy of GM	Light Emitting Diode (LED)
Courtesy of GM	Photo Sensor
Courtesy of GM	Gauge
Courtesy of GM	Diode
Courtesy of GM	Capacitor
Courtesy of GM	Resistor
Courtesy of GM	Variable Resistor
Courtesy of GM	Variable Resistor - NTC
Courtesy of GM	Breakable Wire
Courtesy of GM	Heating Element
Courtesy of GM	Position Sensor
Courtesy of GM	Pressure Sensor
Courtesy of GM	Knock Sensor
Courtesy of GM	Inductive Type Sensor - 2-Wire
Courtesy of GM	Inductive Type Sensor - 3-Wire
Courtesy of GM	Hall Effect Sensor - 2-Wire
Courtesy of GM	Hall Effect Sensor - 3-Wire
Courtesy of GM	Oxygen Sensor - 2-Wire
Courtesy of GM	Heated Oxygen Sensor - 4-Wire
Courtesy of GM	Solenoid - Actuator
Courtesy of GM	Solenoid - Valve
Courtesy of GM	Clutch
Courtesy of GM	Motor
Courtesy of GM	Motor with PTC
Courtesy of GM	Antenna
Courtesy of GM	Speaker
Courtesy of GM	Horn
Courtesy of GM	Microphone
Courtesy of GM	Airbag
Courtesy of GM	SIR Coil
Courtesy of GM	SIR Impact Sensor